64:9::81:?
We have-
√64=8The next number to 8 is9,√81=9 the next number to9is10.
Hence, the answer i.e. 64:9::81:10
The number of 5 digited numbers in which no two consecutive digits are identical is
A) 9(81^2) B) (64)^3 C) 9(64)^2 D) 120